This cover features the USS Indianapolis, SSN-697, submarine, and is postmarked in Connecticut with a hand-stamped cancellation. The stamp used is Sc #1597, depicting a multi-colored image of the submarine. The cover is from the 1971-1980 era and is graded as ungraded. The cover is a great addition to any naval or ship-themed collection. The USS Indianapolis is known for its tragic sinking during World War II and is a significant part of American history. This cover is a must-have for any collector interested in naval events and ships.